Elektrogas Aluminum and cast iron butterfly valves. VF, VFT

[{"filename":"VF-VFH_en.pdf","text":"VF, VFT\n VFH\n\n Butterfly valves\n Rp3/4 … Rp2\n DN40 … DN200\n\n\n\n\ndelta-elektrogas.com EE155 -1025\n\f ELEKTROGAS – Technical Sheet EE155 - 1025\n\n\n\nVF, VFT\nVFH\nButterfly valves\n\n\nContents\n Description ………………………………………….. 2\n Features ……..……………………………..……….. 2\n Functioning and application .………………………. 3\n Technical specifications .………………….……….. 4\n Flow chart (pressure drop) ……........…………….. 7\n Flow velocities chart ........….....................…..…... 9\n Flow factor KVS …............................…..…………. 10\n Ordering information …..…………………………… 12\n Standards and approvals ………………………….. 13\n\n\n\n\nDescription VF, VFT and VFH butterfly valves are designed for regulation and control of gas flow and air flow\n in combustion processes.\n Valves can be operated manually using a lever (to setup the high-fire rate of the burner),\n automatically using a servomotor (modulating or staged control) or a solenoid/pneumatic actuator\n (two-stage control).\n\n\n\n\nFeatures Valves are made of aluminum (VF/VFT types) or cast-iron (VFH type), with wide range of threaded\n connections and for installation between EN 1092 flanges.\n Possibility to have one-size or two-size reductions of the nominal diameter for VF/VFT types.\n Versions suitable for use with air and non-aggressive gases according to EN 437 (VF/VFT types);\n also available for aggressive gases or with seal for low leakages at valve closed.\n Version suitable for heated air and flue gas (VFH type provided with butterfly disc stop).\n The VFH type is provided with a double-eccentricity disc and a spring to reduce the backlash.\n This results in a high precision adjustment and avoids valve floating.\n All components are designed to withstand any mechanical, chemical, thermal condition occurring\n during typical service. Effective impregnation and surface treatments have been used to improve\n mechanical sturdiness, sealing and resistance to corrosion of the components.\n\n\n\n\n ! This control must be installed in compliance with the rules in force.\n\n\n\n\n 2-13\n\f ELEKTROGAS – Technical Sheet EE155 - 1025\n\n\nFunctioning and\napplication VF/VFT/VFH butterfly valves are devices for regulation/modulation using auxiliary power supply\n or manually operated.\n\n\n\n\n - in case of combustion process being\n regulated by combustion air\n modulation, VF(VFT) valves with\n servomotor can be used, coupled to\n another butterfly valve manually\n operated (available graduated scale\n and locking screw) to setup high-fire\n rate of the burner.\n\n\n VF..M\n\n VF..L\n\n Fig. 1\n\n\n\n\n - In case of combustion process with\n VF..M excess of air or gas, VF(VFT) butterfly\n valve can be used, coupled to a\n Lambda sensor for ratio correction.\n\n\n\n\n VF..M\n\n VF..L\n\n\n Fig. 2\n\n\n\n\n - In case of combustion process with\n pre-heated air, VFH butterfly valve can\n be used. Solenoid or pneumatic actuator\n is preferentially suitable for min/max\n regulation with heavy duty cycles.\n\n\n\n\n VFH..SL\n\n\n\n\n Fig. 3\n\n\n\n\n ! Location and mode of installation must be in compliance with local rules in force.\n\n\n\n\n 3-13\n\f ELEKTROGAS – Technical Sheet EE155 - 1025\n\n\nTechnical\nspecifications Tab. 1\n VF, VFT VFH\n Connections Threaded from Rp3/4 to Rp2 From DN40 up to DN200\n according to EN 10226-1 for fitting between two flanges\n From DN40 up to DN150 according to EN 1092 PN16\n for fitting between two flanges\n according to EN 1092 PN16\n Rotation angle 0 / 90° adjustable 0 / 90° adjustable\n Ambient temperature -15°C / +60°C -15°C / +60°C\n Media type Air and non-aggressive gases Heated air and flue gas\n according EN 437\n Max. media temperature +60°C +250°C\n +200°C for use with air only +450°C with dissipators\n (special version on request) (optional kit)\n Max. Operating pressure 500 mbar (50 kPa) 150 mbar (15 kPa)\n Max. Pressure loss 150 mbar (15 kPa) 45 mbar (4,5 kPa)\n @ Vmax\n Flow rate See tables See tables\n Materials in contact Aluminium alloy Cast iron\n with fluid Copper alloy Stainless steel\n Stainless steel Polytetrafluoroethylene (PTFE)\n Nitrile rubber (NBR)\n Fluoroelastomer (FPM)\n Polytetrafluoroethylene (PTFE)\n\n\n Driving systems and - square shaft 8 - manual lever\n actuators - round shaft Ø10 - solenoid SR/SL/ST\n - manual lever - servomotor MZ\n - solenoid SR/SL/ST - pneumatic AP\n - servomotor MZ (opt. lever)\n - pneumatic AP\n\n\n VF DN40 DN50 DN65 DN80 DN100 DN125 DN150\n VFT Rp3/4 Rp1 Rp1¼ Rp1½ Rp2\n S..4      \n S..8    \n MZ        \n MZ..10  \n AP          \n\n VFH DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200\n S..4  \n S..8   \n MZ     \n MZ..10   \n AP       \n\n Fitting between two flanges Fitting onto threaded\n according to EN 1092 PN16 pipelines\n\n\n\n\n Fig.4\n\n 4-13\n\f ELEKTROGAS – Technical Sheet EE155 - 1025\n\n\n\n\nVFT VF\n\n\n\n\n Square shaft Round shaft Manual lever Lever for remote actuator\n (+Set O) (+Set L) (+Set LR)\n\n\n\n\n Solenoid actuator Servomotor Pneumatic actuator\n (+Set S/ST) (+Set M/MT) (+Set P/PT)\n (+Set ML/MTL)\n\n\n Fig.5\n Tab. 2\n Connections Overall dimensions Weight1 Actuator Overall dimensions Weight\n [mm] [Kg] [mm] [Kg]\n\n CH P De L1 L2 L3 H Ø\nRp 3/4 50 70 0,45 SR4 126 160 100 5,0\nRp 1 50 70 0,40 SL4 126 230 100 5,5\nRp 1¼ 65 85 0,75 ST4 126 240 100 5,6\nRp 1½ 65 85 0,65 SR8 134 182 114 7,2\nRp 2 75 90 0,80 SL8 134 252 114 7,7\nDN 40 92 46 80 0,8 ST8 134 262…